How to pass ScriptableRenderContext.BeginSubPass data into shader

I've read the docs
https://docs.unity3d.com/ScriptReference/Rendering.ScriptableRenderContext.BeginSubPass.html
But still have no idea how to pass samplers to shader

var albedo = new AttachmentDescriptor(RenderTextureFormat.ARGB32);

var depth = new AttachmentDescriptor(RenderTextureFormat.Depth);



var attachments = new NativeArray<AttachmentDescriptor>(6, Allocator.Temp);

const int depthIndex = 0, albedoIndex = 1;

attachments[depthIndex] = depth;

attachments[albedoIndex] = albedo;



context.BeginRenderPass(camera.pixelWidth, camera.pixelHeight, 1, attachments, depthIndex);



...



var lightingInputs = new NativeArray<int>(1, Allocator.Temp);

lightingInputs[0] = albedoIndex;



context.BeginSubPass(cameraOut, lightingInputs, true);

// shader have no data

How to pass albedo AttachmentDescriptor into shader? Should i resolve it into other RT, or is there another way?
albedo.loadStoreTarget is supposed for that use like
buffer.SetGlobalTexture("GBuffer0", albedo.loadStoreTarget);
?

 

If you use mobile tile-based GPU with Vulkan or Metal API, you can sample from cbuffer hlslcc_SubpassInput_f_##idx { float4 hlslcc_fbinput_##idx; }. Otherwise, you must fall back to load from TEXTURE2D_FLOAT(_UnityFBInput##idx). Latast SRP may have the LOAD_FRAMEBUFFER_INPUT macro for that.
The way to output to the on-tile buffer is same as regular MRT.

 

Tried to use that in shader

TEXTURE2D_FLOAT(_UnityFBInput0);

SAMPLER(sampler_UnityFBInput0);

TEXTURE2D_FLOAT(_UnityFBInput1);

SAMPLER(sampler_UnityFBInput1);

TEXTURE2D_FLOAT(_UnityFBInput2);

SAMPLER(sampler_UnityFBInput2);

TEXTURE2D_FLOAT(_UnityFBInput3);

SAMPLER(sampler_UnityFBInput3);

But shader decompiler shows that bindings start from 4

-- Vertex shader for "vulkan":

Set 2D Texture "_UnityFBInput0" to set: 0, binding: 4, used in: Fragment  using sampler in set: 0, binding: 0, used in: Fragment

Set 2D Texture "_UnityFBInput1" to set: 0, binding: 5, used in: Fragment  using sampler in set: 0, binding: 1, used in: Fragment

Set 2D Texture "_UnityFBInput2" to set: 0, binding: 6, used in: Fragment  using sampler in set: 0, binding: 2, used in: Fragment

Set 2D Texture "_UnityFBInput3" to set: 0, binding: 7, used in: Fragment  using sampler in set: 0, binding: 3, used in: Fragment

 

Found working version:
FRAMEBUFFER_INPUT_FLOAT +
LOAD_FRAMEBUFFER_INPUT
Thank you a lot.